三个点电荷在同一直线上的相互作用的平衡问题一直是物理考试中出现频率次数较高的一类,这类问题主要包括两个方面:一个电荷平衡与三个电荷平衡。同学们碰到这类问题往往分区域去试探平衡的可能,这样比较费时。能不能总结出简捷的方法呢?下面我们从例题开始分析,逐步归纳这类问题的特点,总结出很实用的歌诀。 The balance of the interaction of the three point charges on the same line has always been the higher frequency of frequency in the physics examination. Such problems mainly include two aspects: one charge balance and three charge balances. Students encounter this kind of problem and often try to balance the possibility of sub-regional, which is more time-consuming. Can we summarize the simple method? Here we start with an example analysis, and gradually summarize the characteristics of such issues, summed up a very practical song.